Mercurial > hg > nginx-quic
view src/os/unix/ngx_thread.h @ 6949:ff0c8e11edbc
Simplified and improved sendfile() code on Linux.
The ngx_linux_sendfile() function is now used for both normal sendfile()
and sendfile in threads. The ngx_linux_sendfile_thread() function was
modified to use the same interface as ngx_linux_sendfile(), and is simply
called from ngx_linux_sendfile() when threads are enabled.
Special return code NGX_DONE is used to indicate that a thread task was
posted and no further actions are needed.
If number of bytes sent is less that what we were sending, we now always
retry sending. This is needed for sendfile() in threads as the number
of bytes we are sending might have been changed since the thread task
was posted. And this is also needed for Linux 4.3+, as sendfile() might
be interrupted at any time and provides no indication if it was interrupted
or not (ticket #1174).
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 28 Mar 2017 18:15:39 +0300 |
parents | ac7c7241ed8c |
children | d230c797b168 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_THREAD_H_INCLUDED_ #define _NGX_THREAD_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #if (NGX_THREADS) #include <pthread.h> typedef pthread_mutex_t ngx_thread_mutex_t; ngx_int_t ngx_thread_mutex_create(ngx_thread_mutex_t *mtx, ngx_log_t *log); ngx_int_t ngx_thread_mutex_destroy(ngx_thread_mutex_t *mtx, ngx_log_t *log); ngx_int_t ngx_thread_mutex_lock(ngx_thread_mutex_t *mtx, ngx_log_t *log); ngx_int_t ngx_thread_mutex_unlock(ngx_thread_mutex_t *mtx, ngx_log_t *log); typedef pthread_cond_t ngx_thread_cond_t; ngx_int_t ngx_thread_cond_create(ngx_thread_cond_t *cond, ngx_log_t *log); ngx_int_t ngx_thread_cond_destroy(ngx_thread_cond_t *cond, ngx_log_t *log); ngx_int_t ngx_thread_cond_signal(ngx_thread_cond_t *cond, ngx_log_t *log); ngx_int_t ngx_thread_cond_wait(ngx_thread_cond_t *cond, ngx_thread_mutex_t *mtx, ngx_log_t *log); #if (NGX_LINUX) typedef pid_t ngx_tid_t; #define NGX_TID_T_FMT "%P" #elif (NGX_FREEBSD) typedef uint32_t ngx_tid_t; #define NGX_TID_T_FMT "%uD" #elif (NGX_DARWIN) typedef uint64_t ngx_tid_t; #define NGX_TID_T_FMT "%uA" #else typedef uint64_t ngx_tid_t; #define NGX_TID_T_FMT "%uA" #endif ngx_tid_t ngx_thread_tid(void); #define ngx_log_tid ngx_thread_tid() #else #define ngx_log_tid 0 #define NGX_TID_T_FMT "%d" #endif #endif /* _NGX_THREAD_H_INCLUDED_ */